Comparison of Multiradius and Singleradius Total Knee Arthroplasty

Comparison of Multiradius and Singleradius Prosthesis Design in Total Knee Arthroplasty Using With Association Sagittal Patellar Offset and Anterior Knee Pain

The Investigators would like to compare multiradius and single-radius total knee arthroplasty using with association between sagittal patellar offset and anterior knee pain in subjects having undergone bilateral total knee replacement.

A prospective, interventional study. A total of to 494 subjects requiring bilateral multiradius( n=247) and singlerasius(n=247) knee arthroplasty will be enrolled. Anterior femoral offset, femoral diameter and patellar offset will be measured by orthopaedic surgeons. In addition, Visual Analogue Scale Score, Oxford Knee Score, WOMAC, SF12 and SF36 will be evaluated postoperative in patients long-term follow up to see if there is a relationship between anterior femoral offset and anterior knee pain. In the direct lateral knee joint radiograph, the distance between the two parallel axis extending from both cortices of the femur is measured as "femoral diameter".The remaining length between the anterior axis and the maximum peak at the anterior of the prosthesis is considered as an "anterior femoral offset". Sagittal patellar offset is accepted by us as the ratio of the anterior femoral offset to the remaining distance between the maximum anterior point of the patella and the posterior vertex in the direct lateral knee joint radiography.

Gonarthrosis; Primary, Gonarthrosis, Gonarthrosis; Primary, Bilateral, Knee Osteoarthritis, Knee Arthritis

Single Radius(SR) femoral design will be perfomed to patients who is going to total knee arthroplasty. Single Radius femoral design is one of knee prosthesis' pattern which shows variation in knee kinematics

Multi Radius(MR) femoral design will be perfomed to patients who is going to total knee arthroplasty. Multi Radius femoral design is one of knee prosthesis' pattern which shows variation in knee kinematics

The distance between the anterior cortex of the femur and the maximum peak at the anterior of the prosthesis is considered as an "anterior femoral offset".Sagittal patellar offset defined by us as the ratio of the anterior femoral offset to the remaining distance between the maximum anterior point of the patella and the posterior vertex in the direct lateral knee joint radiography.

Inclusion Criteria: Clinical and radiological diagnosis of end-stage primary gonarthrosis Exclusion Criteria: History of malignancy, Severe extraarticular deformity, Posttraumatic and septic arthritis sequel

Scott CEH, Clement ND, Yapp LZ, MacDonald DJ, Patton JT, Burnett R. Association Between Femoral Component Sagittal Positioning and Anterior Knee Pain in Total Knee Arthroplasty: A 10-Year Case-Control Follow-up Study of a Cruciate-Retaining Single-Radius Design. J Bone Joint Surg Am. 2019 Sep 4;101(17):1575-1585. doi: 10.2106/JBJS.18.01096.

Liu S, Long H, Zhang Y, Ma B, Li Z. Meta-Analysis of Outcomes of a Single-Radius Versus Multi-Radius Femoral Design in Total Knee Arthroplasty. J Arthroplasty. 2016 Mar;31(3):646-54. doi: 10.1016/j.arth.2015.10.017. Epub 2015 Oct 26.